As learned in the last section, phlebotomy is the act of obtaining a sample of blood for analysis or diagnosis. A phlebotomist is the person who collects blood samples. Collections are performed by venipuncture or capillary puncture.
The primary duty of the phlebotomist is to properly perform venipuncture or capillary puncture to collect a blood sample. But there will be several other duties as well. Those include, but are not limited to:
Prepare the patient and site for specimen collection
Prepare all equipment needed for the blood draw (this may mean restocking the supplies in the work station)
Collect venipuncture and capillary specimens for testing, including proper labeling and storage
Handle, centrifuge and prepare specimens for proper transport, ensuring the integrity and stability of the sample
Adhere to all HIPAA and confidentiality guidelines, including all Code of Conduct and Integrity programs instituted by the employer
Transport and dispatch samples efficiently by prioritizing specimens to ensure desired turnaround times
Identify patients correctly and label all specimens correctly
Provide quality customer service for all internal and external customers/patients, including answering questions
Occasionally perform screening interviews and take vital signs
Sanitize work area
Answer phone calls
Run tests
Perform Quality Control
Use computer software programs to order blood tests or chart the venipuncture procedure
Gloves
Butterfly Needle
Tourniquet
Hub
Alcohol Swabs
Vacutainer Collection Tube
Vacutainer Needle
Cotton Ball
Coban
Lancet
Capillary Collection Tube
Sharps Container
Venipuncture involves collecting blood by penetrating a vein with a needle attached to a blood collection device or syringe.
Capillary puncture involves collecting blood after puncturing the skin with a lancet or special incision device.
How to perform a Venipuncture:
(We will go over this more in class and in greater detail later on in the course)
Identify the patient, verify the blood draw and prepare your supplies. Use PPE (Personal Protective Equipment).
Apply the tourniquet. Make sure it is placed 3-4 inches above the draw site. This will help slow the blood flow, making it easier to find a vein as they become more palpable.
Find the vein. Palpate the arm or hand with a gloved finger around the desired draw site to find a vein that you feel confident poking. There are very helpful techniques we will cover later about this step.
Clean the site. Once you have picked a vein, use an antiseptic, usually an alcohol swab, to clean the location prior to poking. Use a side to side motion to clean the site.
Insert the needle and draw the blood. There are several more steps here and very helpful techniques we will go over later about this step.
Release the tourniquet.
Withdraw the needle, apply the safety cap and dispose of it in a sharps container.
Apply a cotton ball or gauze to the puncture site. (This is best done immediately as you remove the needle). Bandage or wrap the arm with a cotton ball to help stop the bleeding.
It is not uncommon for patients to feel lightheaded or dizzy and even faint when getting blood drawn. Watch for signs of this. Talk to the patient as you draw their blood to gauge their comfort level during the procedure and to help them to feel safe and comfortable. Encourage your patient to rest afterwards if they feel weak, lightheaded, or faint.
How to perform a Capillary Puncture:
Capillary punctures are often used when the needed test does not require as much blood for a sufficient sample.
Identify the patient, verify the ordered test and prepare your supplies. Use PPE (Personal Protective Equipment).
Clean the site. On adults, this is usually a fingertip. On infants, use their heel. (See diagram).
Use a lancet to make a small cut. Most lancets today are safety lancets and have a trigger button making it very quick to make the small cut.
Collect the blood in a Capillary Collection Tube. Sometimes a drop of blood applied to a testing strip is all that is required. Other times you may be collecting drops of blood in an infant collection tube (Microtainer).
Apply a cotton ball or gauze, and bandage or tape it to help stop the bleeding.
Lancet
Capillary Collection Tube
Microtainer
Testing Strip
Handling a Specimen:
Most specimens require a physician’s lab order. Make sure you have this before you draw the blood. Also make sure you have the appropriate vacutainer tubes for the order. Different tests require different tubes. We will learn more about each specific tube later.
Physician orders for laboratory specimens will indicate the type of specimen to be collected; depending on the facility and type of test being ordered, the time to draw the blood may be specified as well.
Some specimens are ordered “STAT” which means to be collected immediately, while others may be ordered as a routine collection.
If a specimen is ordered STAT this means the lab must also be notified that the sample was collected STAT as they will also process it in that fashion. It is usually noted with a sticker on the tube, notation on the order, and notes in the electronic files if there are any.
Certain lab tests must be drawn at specific times.
Fasting
Peak/Trough medication levels
Insulin Resistance Tests
Each tube and test will have specific handling instructions. These details will include things such as:
Order of draw
Additives
How many times to invert the tube
Light sensitivity
Temperature sensitivity
Stability of blood (Time Sensitivity)
Coagulation time
Centrifuge time
Inpatient facilities
Hospitals
Nursing homes
Rehabilitation Centers
Outpatient facilities
Physician offices
Blood banks
Home health
Laboratories
RETURN TO THE GOOGLE CLASSROOM AND DO THE PRACTICE WORKSHEET.
For more information and references on the reading material found in Section 2: Overview of Phlebotomy, click the link below. Test questions will be based on the reading in the sections and not from more information found in external references and website links.